2 finite element simulation2.1 transformation of geometric modelThe assembly geometric model built in the finite element analysis software Pro/E simplifies and modifies the tiny structure through the software UG NX, and saves the files in the intermediate transition format, so that the simplified and modified model can be used for finite element simulation analysis. Once again, the transformed model is imported into ABAQUS through the external file of Import. Meanwhile, the material properties of each part are defined in turn, as shown in table 1.